First, calcium source feed The calcium content of natural plant feeds is less than the calcium requirement of animals, so it is necessary to add calcium source feed to the diet. Stone powder is a comprehensive mining product of limestone and marble. The basic component is calcium carbonate, which contains 34% to 38% of calcium. It is the cheapest calcium source feed. Shell powder shells are the shell of seawater and freshwater molluscs. The main component of the shell is also calcium carbonate. Calcium content is similar to stone powder. Fresh shells must be heated and smashed to avoid spreading the disease. The shell organic matter of Dead Shell has been decomposed and is relatively safe. Shells are often mixed with fine sand and mud, and shell powder containing these impurities has low calcium content. Second, phosphorus source and phosphorus, calcium source feed The mineral feed that provides the provenance is limited to phosphoric acid, sodium phosphate, and the like. Phosphoric acid is liquid and corrosive, and it is inconvenient to use in combination with feed production. Sodium phosphate provides both phosphorus and sodium. Most of the commonly used ones are calcium and phosphorus feeds containing both calcium and phosphorus mineral elements. The bone powder is made by hot pressing, degreasing, degumming, degumming, and pulverizing. The basic component is calcium phosphate. The high quality bone powder contains 28% calcium, 13.1% phosphorus, and 2:1 ratio of calcium to phosphorus. Mineral feed. The simple method of producing bone powder, directly pulverized without degreasing, degumming and hot pressing sterilization, has more fat and protein in the product, is prone to spoilage and deterioration, and also has the danger of spreading diseases, and should be paid attention to when using. Calcium hydrogen phosphate without crystal water contains 29.46% calcium and 22.77% phosphorus. Calcium hydrogen phosphate in 2 crystal water contains 23.29% calcium and 18.01% phosphorus. Calcium and phosphorus in calcium hydrogen phosphate are easily absorbed by animals. Commonly used calcium and phosphorus feed. In addition, calcium phosphate and calcium superphosphate are also rich in calcium and phosphorus, but the absorption rate is inferior to that of calcium hydrogen phosphate. Third, salt The main component of salt is sodium chloride, which can provide sodium and chlorine which are relatively lacking in plant-based feed, and has a flavoring effect, which can enhance the appetite of animals. Fourth, trace element additives According to the required amount of essential trace elements in animals, inorganic salts or oxides of various trace elements are used to prepare trace element additives in a certain proportion to supplement the deficiency of essential trace elements in animals. At present, various kinds of trace element additives have many brands, and it is necessary to carefully identify the quality and the content of trace elements of different compounds. Elegant low profile high power LED linear luminaire for floodlighting, wall wash and wall graze applications to buildings, bridges, monuments. Light projection distance over 10 meters with choice of Cree or Lumileds LEDs in a variety of colours and beam angles for selection. Extruded aluminum profile of high efficient thermal dissipation design with clear tempered glass cover and anti-glare shield. Customizable housing color and length. Various stainless steel mounting brackets with up to 180° tilt angle adjustment for easy installation and light projection setup. Optional anti-glare shield. Seamless line of light when connected in cascade without dark spaces at joints. DC 24V input. DMX control. High brightness contrast level for smooth and consistent color change effect. Preventive vent, waterproof connectors and rated IP66. Wall Washer,Wall Washer Light,LED Wall Washer,RGB Wall Washer,LED Wall Washer Graze Lights,Narrow Beam Angle Wall Washer,High Power Wall Washer StrongLED Lighting Systems (Suzhou) Co., Ltd. , https://www.strongledcn.com